These are the ranks you need to achieve to unlock each skin. (Note that not all are exactly correct)
Unlockable How to Unlock Alien - Nethead Achieve Rank 34 Alien - Praetorian Achieve Rank 19 Alien - Ridged Achieve Rank 10 Alien - Warrior Dome Achieve Rank 04 Marine - Connor Achieve Rank 05 Marine - Gibson Achieve Rank 02 Marine - Johnson Achieve Rank 22 Marine - Moss Achieve Rank 13 Marine - Rookie Achieve Rank 28 Predator - Claw Achieve Rank 03 Predator - Hunter Achieve Rank 16 Predator - Spartan Achieve Rank 31 Predator - Stalker Achieve Rank 07 Predator - Wolf Achieve Rank 25
Contributed By: matthewmdg.
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